Temporary zinc oxide–eugenol cement: eugenol quantity in dentin and bond strength of resin composite

Abstract

Uptake of eugenol from eugenol-containing temporary materials may reduce the adhesion of subsequent resin-based restorations. This study investigated the effect of duration of exposure to zinc oxide-eugenol (ZOE) cement on the quantity of eugenol retained in dentin and on the microtensile bond strength (μTBS) of the resin composite. The ZOE cement (IRM Caps) was applied onto the dentin of human molars (21 per group) for 1, 7, or 28 d. One half of each molar was used to determine the quantity of eugenol (by spectrofluorimetry) and the other half was used for μTBS testing. The ZOE-exposed dentin was treated with either OptiBond FL using phosphoric acid (H₃PO₄) or with Gluma Classic using ethylenediaminetetraacetic acid (EDTA) conditioning. One group without conditioning (for eugenol quantity) and two groups not exposed to ZOE (for eugenol quantity and μTBS testing) served as controls. The quantity of eugenol ranged between 0.33 and 2.9 nmol mg⁻¹ of dentin (median values). No effect of the duration of exposure to ZOE was found. Conditioning with H₃PO₄ or EDTA significantly reduced the quantity of eugenol in dentin. Nevertheless, for OptiBond FL, exposure to ZOE significantly decreased the μTBS, regardless of the duration of exposure. For Gluma Classic, the μTBS decreased after exposure to ZOE for 7 and 28 d. OptiBond FL yielded a significantly higher μTBS than did Gluma Classic. Thus, ZOE should be avoided in cavities later to be restored with resin-based materials.

Quantitative Analysis of Defects at the Dentin-Post Space in Endodontically Treated Teeth

“…Eugenol-based sealers remain the primary choice for endodontics because of their long history of clinical success [63]. However, eugenol can infiltrate dentin [36,39,40], thus reducing the bonding efficiency and causing polymerization defects [41]. This aspect is consistent with the results reported in this study.…”

“…Regarding endodontic sealers, the persistency of residues on the root canal walls could cause defects within the post-core materials, thus affecting the bond strength [36,37,38,39,40,41]. …”

Influence of Eugenol-based Sealers on Push-out Bond Strength of Fiber Post Luted with Resin Cement: Systematic Review and Meta-analysis

“…Eugenol is a phenolic compound that presents radical scavenging properties (6), which could delay the polymerization reaction (7). When in contact with resin-based materials, such as resin-based luting agents, eugenol may react with free radicals and inhibit the polymerization process (8,9), reducing bond strength and clinical success of restorative procedures (10,11).…”

Avaliação da atividade antimicrobiana dos materiais restauradores temporários: teste de difusão em ágar, quantificação do biofilme e micro-organismos dos canais radiculares submetidos ao desafio ácido in situ

“…No entanto, O OZE não de adere a estrutura dental e apresenta risco crescente de fratura dentária devido à expansão tardia desse material (BELLO et al, 2014;TENNERT et al, 2016). Os resíduos de eugenol podem interferir na polimerização de materiais resinosos, além de alterar a cor da estrutura coronária (KOCH et al, 2013). Estudos demonstram resposta inflamatória significativa aos tecidos, instabilidade dimensional a variações térmicas (KOCH et al, 2013;MUSTACHE et al, 2015;TENNERT et al, 2016).…”

“…Os resíduos de eugenol podem interferir na polimerização de materiais resinosos, além de alterar a cor da estrutura coronária (KOCH et al, 2013). Estudos demonstram resposta inflamatória significativa aos tecidos, instabilidade dimensional a variações térmicas (KOCH et al, 2013;MUSTACHE et al, 2015;TENNERT et al, 2016).…”